Bus Speed

[NV30]

Just how can you find out what your bus speed is?

 

[Vassal24352]

what type of cpu do you have?

 

[Vassal24352]

you can go into the bios and see how fast your bus speed is

 

[NV30]

Using a P4 1.7 GHz CPU on an Intel D845HV mobo.

 

[Vassal24352]

then the bus for your cpu is 400mhz

 

[NV30]

OK Thanks. My 3DMark compare page though shows 100Mhz. Is this an error?

 

[Vassal24352]

hmmm it could be 1 of 2 things,#1 it is an error in the program and it detects it as 100mhz or #2 the bus setting in your bios is at a lower setting

 

[GeForce]

Hmm I dunno exactly if 3DMark or the BIOS reports an actual 400mhz bus (never used a P4), but doesn't the P4 execute 4 instructions per clock cycle, which is effectively originally a 100mhz bus?

 

[Vassal24352]

very true Geforce that slipped my mind

 

[Th3M1ghtyD8]

The (Original) Pentium 4 Uses a 100Mhz Bus, Quad pumped (aka 4 accesses per cycle) i.e. giving an effective 400Mhz Bus.

The New 133Mhz Based Pentium 4 has an effective bus speed of 533Mhz (4x133)

AMD Athlons (T-Bird Core) and Durons use a DDR (Double Data Rate) 100Mhz Bus. i.e 200Mhz

New Athlons i.e. XP use a 133 DDR Bus i.e. 266Mhz

Future Athlons may use a 166Mhz DDR Bus i.e. 333Mhz

 

[NV30]

Ok, thanks for clarifiying.